Traffic Signals
What is the purpose of a traffic signal?
A traffic signal assigns the right of way at an intersection. When properly installed at a proper intersection.It moves traffic in an orderly way.
Advantages of Traffic Signals:-
Traffic signals help control the flow of vehicles, pedestrians and bicycles by giving “right-of-way” to the various
movements in an orderly manner.Signals that are properly located, designed and maintained can:
- Provide for orderly movement of traffic;
- Increase capacity of the intersection;
- Reduce frequency and severity of certain types of crashes, especially right-angle collisions;
- Provide for continuous movement of traffic at a definite speed along a given route.
- Interrupt heavy traffic at intervals to permit other vehicles or pedestrians to cross.Overall, traffic signals help us get
where we’re going safely and in a timely manner.
Disadvantages of Signals:-
Traffic control signals are often considered a panacea for all traffic problems at intersections. This belief has led to the
installation of traffic control signals at many locations where they are not needed, and where they may adversely affect
the safety and efficiency of vehicular, bicycle, and pedestrian traffic.
Even when justified by traffic and roadway conditions, traffic control signals can be ill-designed, ineffectively placed,
improperly operated, or poorly maintained. Unjustified or improper traffic control signals can result in one or more of
the following disadvantages:
• Excessive delay;
• Excessive disobedience of the signal indications